Lathe attachment.



Ape. WICKLAND Q A. T. Briom;

LAHE ATTACHMENT. `APPLICMIOY FILED MAYJS; 19M. pmwz, 1 Patentedm7111915.

'2 SHEETS-SHEET l- A. E.. WICKLAND A. Ti BENTON` 'LATPE ATTACHMENY.APPilcAT|oN FILED MAY i8, :914.

Pafenfd May 11,1915.

2 SHEETS-SHEET 2.

WITNESSES:

ein

boringand grin and the like,`with,ji1st as. great effect and* UNITEDsTATEs PATENT OFFICE:

ANToNE. WICKLAND AND ARTHUR T. BniTToN, or SAN Josn, caiiironma.

ALATHE ATTACHMENT.

Maasai. l

To all whom it may concerni' Be it. known that we, YAirrim E. WicknaN-n,subject of the King of Sweden, and ARTHUR T. BRITTON, a citizen of theUnited States, residing at SanJose, in the county of Santa Clara 'andState of California, have invented new and useful Improvements' in LatheAttachments, of which the following is a specification. 'r Thisinvention relates to a boring and grinding. attachment for enginelathes.

In the present advanced state of the gas engine industry it has becomestandard practice among builders of the better grades of gas engines andautomobiles to finish their'l cylinders by grinding onspeciallyconstructed grinding machines.I v

The object of the -present invention is to provide a simple andsubstantial'grinding and .boring attachment which mayv be ap.- plied toany -ordinary hollow spindle engine lathe without impairing itsusefulness for regular work, and which is so constructed and adjustedthat it may be used for reding gas engine cylinders,

accuracy as machines which are especially constructed for that purposeonly.

Another object of the invention is to provide the attachment with anovel Jform of adjustment by which a greater or lesserrcut may be takenwhen reboring or grinding.l

Further objects will-hereinafter appear. y The invention consists oftheparts and the construction and combination .of parts as hereinafter morefully described, having reference vto the accompanying drawings, in

Figure 1 is a partial side ordinary hollow spindle lathe, application ofthe invention. Fig. 2-.1s a horizontalsectionon line X-X, of Fig. 1.

elevation of an y Fig. 3 is a detail viewof the attachable boring head.Fig. 4 is across section on'n line V-V, of 2, showing the universal` vjoint connection. 1

Referring to the drawings, A indicates in eral an ordinary hollowspindle engine lathe; 2 the Vs and shears; 3 the carriage,-

.Specification of Letters Patent.

l groove,

position of the friction bearings,

a shaft 21. The inner end of said shaft is showing thejoint connection Iand 2.5, but

and 4 the ordinary angle plate to which theI cylinder 5, or other workto be handled is secured. TheA hollow spindle upon the lathe, indicatedat 6,is.threaded internally, as at 7, at the outer endto permit :theapplication of a bearing extension.f8, `upon .which an auxiliary drivingpulley 9 isjourna'led. .The Y innery end of the spindle is providedwith. the usual threadedextension 10, upon which the chuck is mounted. Aspecial form yof chuck is, however, used inthe present instance; thatis, when the boring and-grinding attachment is to be vapplied'. Thechuck con-i sists of an internally threaded hollow sleeve groove l'whichengages with aprojection vided for the purpose of holding the screw in afixed chuck. y Y V 18 indicates a spindle extension, the inner end'ofwhich.is`provided with a dove-tail which is 'adapted to be.. slippedover the dove-tail extension 13 upon` the lface of the chuck. The centerportion of this grooveis slightly'eonvex, and threaded, as at V19,'topermit engagement with screw 15. turning of the screw spindle extensionradially' with relation to the center of the chuck and hollow spindle.Suitably journaled in the spindle extension, but preferably in theantiindicated at 19" and 20, is

provided with a universal 22, by which connectiony is Ina-'de with asecondary is, thelcap25 is provided with a square or hexagonal recessinto which va head of simi- Patented Mayfllv, 1915.

" application ledMay 18, 1914. Serial No. 839,266. l

The' 15 will thus adjust the position lwithin the' head of the shaft 23.f Theouterfend lof ysaid shaft is alsoprovided with a universal joint l24 which is'connected with a' cap 25, secured 'to -the auxiliary pulley9. form ofuniversal joint may be. used at 23- preerablythe type shown;that Any 'suitable' y 60 'as at 31 for this purpose.

'lar shape Formed on the end of shaft 23 may be inserted; the head beingslightly' smaller in diameter givesI suicient play to permit ofuniversal action. This'forms a very simple and practical universalconnection, which may be quickly assembled or disconnected, as conditionmay' require". l A Y Suitably secured on the outer end of shaft y 21 isa grinding. whee'l27.l .This wheel may be constructed of any abrasivematerial, and may be as large or small as conditions may' require. l Inoperation cylinder 5, or other'work to b1 handled, is first secured tothe angle plate -eiwhich is mounted upon carriage 3. Chuck. 11 is thenscrewed on to the threaded 'nose l of the main hollow lathe spindle.Screw 15 is then turned until exte on'spndle 18 has'been adjustedradially t e des1re`d distance; the grinding Whee127 of suitable sizehavingyfirst been applied. 'Power' isiben appliedto one of theslow-speed pulleys ,in cli-cated at 28, which aresecured upon the hollowspindle, and will theneause thespindle with connected chuckfll i"andextension spindleflS to turn vin unison' with-same. The radialadjustment of spindle- Z18`should be such that-"a, slight. `eccentriclmovement'of" same is produced. Power is then applied`to'-' the`auxiliary. .lpulley 9, whichis'designed to f revolve at` h ighf'speed.;and' l-this. is trans` mitted through cap 10,'.universal joint '24,shaft 23 andunijversal joint 22, to shaft `21, f upon .which the'grinding wheel: is secured. The grinding wheel is thus revolved inde-l'pendently of the"spindle, and-'any' desired sp'eedl may thus betransmittedv to. same., through 'pulley- 9.- The rotary movementtransmitted lthrough ypulley 28 -and extension spindle 18 .causes it'totravel in an eccentric path. 4Carriage 3,' upon which cylinder 5, to beground, is m'oun'ted isthen. slowly ad- -vancedwith relation to thegrinding Wheel,

and may' befed in this directionin'the usualy ff manner by the screwfeed of the lathe. "1

Theabrasive Wheel is generally of slightlyL smaller' diameter than theinterior j' of the sameltwi lijcause it to travel ound the in.- 'terio oj the 'cylinder'andconsequently 4en The extension spindle 1S, mounteadjusted inthe manner shown, may also' b e used to great advantage whereit is necesbefore regrinding samel The grinding wheel f is in thisinstance removed and a cuttercylinder, but the eccentric movement ofgage with everyportion of same. f

l d `and sary to take a slight cut out of the cylinder head 30ofsuitable construction is. applied.

,ordinary hol The attachment here shown is simple in. f construction andmay be applied to any 5f,

low spindle engine lathe dithout impairing its usefulness in any manner.It eliminates thev use of especially con structed grinding machines; andfurthermore; combines two machines in one ,as to either one of twomachining operations may be employed ;l viz: boi-in or grinding. ltlenhances the value and en arges the scope of the engine lathe, sinceitprovides means Kor doing work heretofore impossible to accomf plish. ona lathe.

The materials and linish of the severat parts of the attachment may .besuch as the experience and judgment of the n1anufacturer may dictate.

g We Wish it understood that various changes in form,'proportion andininor dev -tails of lconstruction may be resorted to Within the scopeof the appended claims, nd that We donot wish to limit ourselves o thespecific design and construction here shown.

The term cutting tool hereinafter lused in the claims is to beunderstood as meani g" l any tool,l or implementlwhich is suitable orabrading or cutting purposes.

n Having hus described our invention, what We -claim and'desire toysecure by Letters Patent is:

l. In' combina/tion with the spindle of a 95. lathe havingan exteriorlythreaded end, va chuck threaded over said spindle end and having a headwhichda'tte'ris provided with a diametri'cally extending dove-tailexten' sion, said extension being 'provided-with a 100 `sc reW-threadedrecess and a projection which `entends into the recess, 'a spmdleextension having a dove-tail groove which receives said dove-taileXtensio and Lalsohaving a screw-threaded recesswhich registers with thescrew-threaded recess of the dove-tail extension, ascrew engaged in saidregistering recesses and having an annular groove which'receives saidprojection, a work engagingelement borne by the spindle exten-v sion,means to drive said element, and means .to dri-ve the spindle.

2; In-combination with the spindle lathe, a chuck secured to the vfrontend of thet splndle and having a doveztail extension,l a- 1 15 vmemberhaving a dove-tall groove which. j

slidably receives said dove-tail extension,

` rotatable screw engaged with the member and with' the extension to4move the member u.

.laterally of thespindle, means 'to hold the. 120.

screw against endWis'e movement, a Work "en- 1 The outer end ofthespindle being threaded 'gaging element' borne bythemmember, lmeansThexcutt'ing tool 32,mounted in the head may be fastened in any suitablemanner, and the depth of the A cut-is adjusted by screwl.

to rotate .said element., and..means'todrive.. f the spindle.- 'l n 3.In combination with the spindle of-la` 125.-. i -lathe, chuck secured tothe front end of the meee Y f a spinle and having e dovete exeisien, eSei; our hands i'n 'the presence of tw@ submember having a deve-tailgmeve which, eexribng Witnesses. sldably receives said dove-taiextension, ANTON E VXCKLAND means for adjusting the member n seii ARTHURT. BRITTN.

groove, al werk engaging element borne by the member, means to driveseid member, Witnesses:

and means to rive the spindle. Sume're,

In testimony whereof We have hereunto R. C. MCCQRNISH.

